manual: adding packages luarocks

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
[yann.morin.1998@free.fr: some cleanups and rephrasing]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
perl: skip some tests which need the toolchain
perl: skip one test for DynaLoader
perl: check date in harness
perl: new infrastructure
cpan: a home for Perl modules
scancpan: a new script

which populates the directory package/cpan
cpanminus: remove it
perl: remove useless patch

after the removal of cpanminus
qemu: add a Config.in.host

after the removal of cpanminus
host-libxml-parser-perl: move and refactor with perl infrastructure
host-libmodule-build-perl: new package

the version coming with host-perl is too old
manual: adding packages perl
libcurses-perl: new package

(depends on ncurses)
libnet-ssleay-perl: new package

(depends on openssl)
libxml-libxml-perl: new package

and its CPAN dependencies

(depends on libxml2 & zlib)